palmer



'(No Model.)

R; A. PALMER. GRATE CONSTRUCTION. No. 459,948. Patented Sept. 22, 1891.

3E ii i WITNESSES Z/vVE/vTm UNITED STATES PATENT OFFICE.

RANDALL A. PALMER, OF SAGINAI'V, MICHIGAN, ASSIGN OR TO THE VALLEY MACHINE COMPANY, OF SAME PLACE.

GRATE CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 459,948, dated September 22, 1891.

Application filed December 11, 1890. Serial No. 874.377. (No model.)

To all whom it may concern: make one of the projections a longer than Be it known that I, RANDALL A. PALMER, a the other projection a. Then, by reversing citizen of the United States, residing at Sagiend for end the alternate bars, it is manifest naw, county of Saginaw, State of Michigan, that the proper spacing is accomplished, as 5 have invented a certain new and useful Imshown in Fig. 1.

provement in Grate Constructions; and I de- The grate-sections are preferably made clare the following to be a full, clear, and exsmall, so as to effect the greatest economy in act description of the invention, such as will repairing, and the shorter they are the less enable others skilled in the art to which it liability exists of their warping in use. These IO pertains to make and use the same, reference sections may extend only as far as the shoulbeing hadto the accompanying drawings, der a), in which event I prefer to hollow out which form a part of this specification. the grate-supporting bar under the shoulder In the drawings, Figure 1 is a plan view of a, as shown at a, so as to permit air from a grate embodying my invention. Fig. 2 is beneath to pass up around the end and so 15 a longitudinal section of the same. Fig. 3 is assist in effecting combustion clear to the a separate perspective view of one of the end of the grate-supports and at the same supporting-bars. Fig. 4 is a side elevation time keeping the grate-bars at a proper temof one of the grate-supporting bars, showing perature. The sections may, however, exa modification of my invention; and Fig. 5 tend clear to the extreme end of the support- 20 is a transverse sectional view of the grateing-bars, as shown in Fig. 4, in which event supporting bar exhibited by Figs. 1, 2, and 3. the portions a and a are dispensed with.

It is the purpose of my invention to pro- 13 represents the grate-sections. They are duce a grate construction in which there cast preferably of uniform depth throughout, shall be little liability to burn out or warp so as to afford least liability to work under 25 the grate-supports and in which the grate variations of heat. The openings through proper is made up of sections which can be them are preferably of least dimensions at removed and replaced at very little expense the upper surface, so that should anything in case any section may become burned out. pass in between the grate-bars at the top it Theinvention consists of the combinations will be sure to pass out freely beneath, as

0 of devices and appliances hereinafter specishown at b in Fig. 2.

fied, and more particularly pointed out in The sections B are so constructed as to rest the claims. edge to edge and make an unbroken and nut In carrying out my invention A represents form fuel-surface, and preferably extenddonthe grate-supporting bars. These bars each gitudinally of the supporting-bars.

3 5 consist of a stiif web a, provided with a These grates are adapted for steam and strengthening-bead a at its top edge, which heating furnaces, grates, and, in fact, for all is beveled at opposite sides to form a knifeplaces where grates are employed. edge hearing or is otherwise made narrow at What I claim is its upper edge, so as to present as little sur- 1. A grate comprising gratesupporting 9o 40 face as possible to the under side of the bars, each consisting of a web provided along grate-sections, thereby conducing to safety its upper and lower edges with stiffeningagainst burning out said sections. At the beadsand at its ends with laterally-projecting end of each grate-supporting bar it is formed spacing-beads a and a, of different lengths, at a to rest upon a suitable support, and is the said bars being arranged in pairs and each 45 projected at its edges at a and a, so as proppair supporting near their edges a number erly to space the said bars. I space the bars of grate-sections extending from bar to bar, so that each grate-section shall rest on two substantially as described. bars disposed near its edges, in order to give 2. A grate comprising grate-supporting them stability and prevent liability to tilt up bars, each consisting of a web provided along about either support when in use. To acits upper and lower edges with stiffeningcom plish this irregular spacing of the bars, I beads, the upper bead being beveled and presenting a knife-edge t0 the grate-sections, and at its ends with laterally projecting spacing-beads a and d of different lengths, the said beads being provided with shoulders a and hollowed out beneath the shoulder to form a space a for the passage of air, the said bars being arranged in pairs and each pair supporting near their edges a number of grate-sections extending from bar to bar, substantially as described. 10

In testimony whereof I sign this specification in the presence of two Witnesses.

RANDALL A. PALMER.

\Vitnesses:

WILL A. BREWER, STANLEY LORTH. 

